History of Field::label 1 change

In crates/backdrop/src/field.rs, lines 176–187 on 306aec1839aae6645613e3e938b1f191b7dfeb734eb71f0d91b1ff25fcebe688. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 176,187:crates/backdrop/src/field.rs.